Add Pager placeholder styles

[getdave]

Add placeholder styles for "Paging".

// ==========================================================================
// PAGING
// ==========================================================================

// PAGER
// ==========================================================================

.pager {
    margin-bottom: $baseLineHeight;
}

.pager__item {

    a {
        @extend .btn;
        border: 0;
    }
}

// PAGINATION
// ==========================================================================

.pagination {
    a,
    span {
        @extend .btn;
        border: 0;
    }

    .current {
        background-color: $pColor;
        color: #fff;
    }

    .prev,
    .next {

    }

    .dots {
    }
}

[getdave]

Also add placeholder stub for "page-links" which are when you have a paginated post. Edge case, but should guard against it.